Fuse-holder for electric-circuit conductors.



PATENTED APR. 14, 1908.

P. MoDONALD. I FUSE HOLDER FOR ELECTRIC GIROUIT GONDUOTORS.

APPLICATION TILED OGT.2,1905'.

' Toc'll whom a may Gamma mam cDoNAL-D,

or ito-cirnsrnn, NEW-YORK, ASSIGNOR or ONE-HALF T GEORGE HERBERT snrrmior RocHEsrEaNEwfYosK. g I

TUBE-HOLDER roa s'Lnc rnrceoiacurr oonnuc'ro'ns.

Specification of Letters Patents Patented April 14,,1908.

Application filed Qctober 2, 1905. Serial No. 280,977.

'Be a known that L-PATRICK Moms.)

of -Rochest'er,-in the county of'Monroe and .Stateof New York, have invented certain new" and useful Im rovements in .Fuse- Holdersfor Electric-Qncuit Conductors; and I dohereby declare-the followin to be a full, clear; andexact description of t e same,"reference had to the accompanying drawings, forming a part of the specification, and to the reference-numerals marked thereon.

' My presentinvention has for its object to provide a; fuse holder or terminal head for .condu'ctoror line wires, such as are used par-. ,ticularlyfor telephones and telegraph lines, which'are fre uently bound into 'a'cable the severalwires t ereof terminating at a common station from whichlead the extension wires connected to the separate instruments.-

.-.My invention has forit's further object to provide a holder, in which jthefuse maybe protected so that if it is burnedout by an eiicessive voltage on the line from-any cause, no damage can-result to thefixtures orother inserted without requiring theuse of special tools. I r

adjacent parts and a new fuseniay' be quickly To these and other ends the invention con- I sists in certain improvements and combinations of parts all aswill be hereinafter more fully described the. novel 'featuresbeing pointed out in the claims at the end of the specification. I

' i In the drawings: Figure 1 is aside elevationof the device constructed in accordance with my invention. Fig. 2 is a longitudinal sectional view thereof. Fig, 3 is a detail cross sectional view taken on the line 3 3 ofFig; 2. Fig.4is a detail perspective view 40.

of one of the closure pieces.

Similar referencenumerals in the several figures indicate similar parts.

my invention is designed particularly to rovide means for supporting or holding the A fuse holder or terminal head embodying 1' use wire, which is usually interposed-in the line WlfeS-Of an instrument clrcuit to prevent the latter from injury from excessive voltage ofcurrent accidentally received on the-wire from any source, so that the fuse may be protected from atmospheric conditions as well as from accidental injury and when destroyed by being burned out it may be readily replaced.

i t In illustrating the present embodiment of my-invention li have shown the device as comprising a seat piece 1 having athre'aded stem 2 provided with a nut 2* forming means for securing the holder to a support, such as a frame ie'ce 3; and in order to perfectly insulate t e seat from the support the stem is surrounded with a bushing 4 of insulating material at the ends of which are washers 5 0f similar material and larger in diameter than thebushing to overlap opposite sides of'the support, asshown. Tie seat 1 is recessed or cup-shaped and adapted to receive one end of a shell orfuse holder 6 which in the present instance is shown as'a tube" and containing the fuse, wire 7 but the shell may be otherwise constructed to receive said wire without being a. closed tube although I deem that to be the preferable form. The outer end or the'holder is closed by a recessed cap 8 and this in turn is provided'witha screw-9 forming means for binding the one terminal a of the line the other terminal I) being conveniently attached to the seat 1 by passing it beneath the nut 2.

To facilitate the application of the fuse wire theholder is provided at each endwith shallow dc ressions or grooves 10, of a depth less than t 1e diameter of the fuse wire, into which the endsof the wire are placed after being bent over the ends of the holder.

This enablesone end of the latter to be vin- I serted intothe seat piece 1 and the cap piece 8to be applied to the otherend thereof with the ends of the fuse wire in frictional en" gagement with the inner surfaces of said pieces. Near each of the'ends of the holder a mxtch or annular groove 11 is provided whi r is adapted to receive an inwardly extendingprojection or point '12 on a spring finger 1.3 located on the sides o-f'the seat and ca pieces."

irom the fromeach ot ier by the holder 6 and when the .fuse wire is intact it places them in electrical connection, but if .a current of sufficiently high voltage passes over'the line'tlief fuse may be destroyed without the liability of damaging adjacent parts and as the fuse is entirely inclosed within the holder there is no l1ab1lity of igniting or otherwise injuring other foregoing it will be seen that the seat and ca pieces 1 and 8 are separated.

apparatus :rrramred in proximity thereto.-

i'enit becomes necessary to replace the fuse an operator may withdraw the cap 8 by exerting sufficient force thereon to disengage the projection 12 thereon from the recess 11 and by a similar operation he may remove the holder 6 from the seat piece 1. A new fuse of the reguired length may then be inserted, its en s bent over the ends of the holder and secured in the rogves' or recesses 10, as before described, w en-the parts Ina; be re-united and the line circuit restored.

A device such as I have described is simple in construction as the seat and cap ieccs may be made of metal and the ins ating portions such as the bushing 4, the washers 5 and the holder 6 me be made of porcelain, gutta percha, or in urated fiber and their lengths, or diameters, increased or diminished as the requirement of special or pecul- PATRICK Witnesses G. WILLARD R1011, EDWIN A. 'Woonwann.

provided with 

